基于FLAC^(3D)的双孔隧道围岩稳定性数值模拟分析  

Numerical simulation analysis of the stability of double bore tunnel surrounding rock based on FLAC^(3D)

作　　者：程长清 吴雪琴[1] 赵文广 Cheng Changqing;Wu Xueqin;Zhao Wenguang(Wuxi Traffic Branch of Jiangsu Union Technical Institute,Wuxi Jiangsu 214151,China;Henan Jintu Technology Group Co.,Ltd.,Zhengzhou Henan 450000,China)

机构地区：[1]江苏联合职业技术学院无锡交通分院,江苏无锡214151 [2]河南金途科技集团股份有限公司,河南郑州450000

出　　处：《山西建筑》2023年第20期126-128,共3页Shanxi Architecture

基　　金：国家自然科学基金项目(51774007)。

摘　　要：针对双孔隧道在施工过程中产生的复杂应力场与位移场,通过有限差分软件FLAC^(3D)数值模拟,采用Drucker-Prager准则作为岩土体塑性屈服准则,计算得到双孔隧道开挖及支护后隧道的应力场及位移场分布规律。进而分析得到了双孔隧道需要支护的关键位置及锚杆最小设计长度要求。结果表明:采用喷锚支护能够有效阻止塑性区的扩大,对提高围岩承载能力影响显著。To address the complex stress and displacement fields generated during the construction of the double bore tunnel,this paper uses the Drucker-Prager criterion as the geotechnical plastic yield criterion through numerical simulation with the finite difference software FLAC^(3D)to calculate the distribution of stress and displacement fields in the tunnel after excavation and support of the double bore tunnel.In turn,the key locations and the minimum design length of anchors required to support the double bore tunnel were analyzed.The results show that:the use of spray anchor support can effectively prevent the expansion of the plastic zone,the spray anchor support has a significant impact on improving the bearing capacity of the surrounding rock.

关 键 词：FLAC^(3D) 喷锚支护 双孔隧道 岩土工程 围岩 

分 类 号：TU457[建筑科学—岩土工程]